I GOT YOU.
First things first,
When multiplying fractions, it's super super super simple. Just multiply the numerator and denominator across, then simplify if needed!
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To solve your problem,
1. multiply the numerator across.
3 x 4 x 7 = 84
2. multiply the denominator across.
5 x 2 x 3 = 30
3. now you have the fraction
(84/30 if you're on mobile)
4. simplify
84/30 has a common factor of 6. So it simplifies to 14/5.
Your answer is
14/5